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/* includes; won't compile in tests, in the docs we leave out the comment lines to show them
# include <libdnf5/repo/download_callbacks.hpp>
*/
class PackageDownloadCallbacks : public libdnf5::repo::DownloadCallbacks {
private:
using TransferStatus = libdnf5::repo::DownloadCallbacks::TransferStatus;
/// List of descriptions of downloads.
std::forward_list<std::string> download_descriptions;
void * add_new_download([[maybe_unused]] void * user_data, const char * description, double total_to_download) {
std::cout << "Started downloading: " << description << ", size: " << total_to_download << std::endl;
// Store the message describing the new download and return a pointer to it.
return &download_descriptions.emplace_front(description);
}
int end(void * user_cb_data, TransferStatus status, const char * msg) {
// Check that user_cb_data is present in download_descriptions.
std::string * description{nullptr};
for (const auto & item : download_descriptions) {
if (&item == user_cb_data) {
// Get the description from the user_cb_data.
description = reinterpret_cast<std::string *>(user_cb_data);
break;
}
}
if (!description) {
return 0;
}
std::string message;
switch (status) {
case TransferStatus::SUCCESSFUL:
std::cout << " Downloaded: " << *description << std::endl;
break;
case TransferStatus::ALREADYEXISTS:
std::cout << " Already downloaded: " << *description << std::endl;
break;
case TransferStatus::ERROR:
std::cout << " Error downloading: " << *description << ": " << msg << std::endl;
break;
}
return 0;
}
};
// Set the download callbacks.
base.set_download_callbacks(std::make_unique<PackageDownloadCallbacks>());
// Download the packages.
transaction.download();
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